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Classifications of gantry crane (part 2)
2014-11-10 10:40
Classifications of gantry crane (part 2)
Girder structure
1. Joist-beam
Structure using angle iron or welded I-beam, the advantage is low cost, light weight, wind resistance. However, due to the welding points and trusses own shortcomings, joist also has a deflection of large and small stiffness, relatively low reliability, the need for frequent detection of weld defects. Suites for the fields lower security requirements and smaller lifting weights.
2. Box-Girder
Use steel plate welded into the box-type structure, with high security, rigidity and other characteristics. Generally used for large tonnage and large tonnage of gantry cranes. Like MGhz1200, capacity 1,200 tons, the largest gantry crane girder using a box girder structure. Girder also has high cost, self-important, less wind resistance and other shortcomings.
3. Cellular Beams
Generally refers to the "isosceles cellular beam", the main beam end face is triangular; there are holes on both sides of the honeycomb oblique abdomen, upper and lower chords there. Cellular joist beam has characteristics of joist beam and box-girder, having greater rigidity, small deflection, and higher reliability representing joist beam. However, due to the use of welded steel, the weight and the cost is slightly higher than the joist beam. Apply to the use of frequent or large venues lifting fields.
Because of this beam type is patented product; there are few producing manufacturers ------- (Zhengzhou Huazhong Construction Machinery Co.Ltd)
Girder structure
1. Joist-beam
Structure using angle iron or welded I-beam, the advantage is low cost, light weight, wind resistance. However, due to the welding points and trusses own shortcomings, joist also has a deflection of large and small stiffness, relatively low reliability, the need for frequent detection of weld defects. Suites for the fields lower security requirements and smaller lifting weights.
2. Box-Girder
Use steel plate welded into the box-type structure, with high security, rigidity and other characteristics. Generally used for large tonnage and large tonnage of gantry cranes. Like MGhz1200, capacity 1,200 tons, the largest gantry crane girder using a box girder structure. Girder also has high cost, self-important, less wind resistance and other shortcomings.
3. Cellular Beams
Generally refers to the "isosceles cellular beam", the main beam end face is triangular; there are holes on both sides of the honeycomb oblique abdomen, upper and lower chords there. Cellular joist beam has characteristics of joist beam and box-girder, having greater rigidity, small deflection, and higher reliability representing joist beam. However, due to the use of welded steel, the weight and the cost is slightly higher than the joist beam. Apply to the use of frequent or large venues lifting fields.
Because of this beam type is patented product; there are few producing manufacturers ------- (Zhengzhou Huazhong Construction Machinery Co.Ltd)
